Positioning Tag with Alert Function

1. A method comprising: transmitting, by a device for mobile data processing, an alert signal in response to an attachment base moving from a first position to a second position relative to at least one formation of an enclosure, wherein movement of the attachment base occurs when an external force exceeding a first threshold pulls the attachment base away from the enclosure, wherein each of the at least one formation of the enclosure comprises a first recess and a second recess, wherein a first portion of the attachment base is external to the enclosure and a second portion of the attachment base being internal to the enclosure, the attachment base comprising at least one spring that is configured to engage the first recess of the at least one formation of the enclosure in the first position and the second recess of the at least one formation of the enclosure in the second position in response to the external force, the device further comprising a detector circuit having a sensor that is configured to detect when the at least one spring of the attachment base repositions from the first recess and the second recess of the at least one formation of the enclosure, and wherein the tag is removably attached to the attachment base and is operable to detach from the attachment base when the external force exceeding a second threshold pulls the tag and the attachment base away from the enclosure, and wherein the second threshold is greater than the first threshold, wherein the tag comprises a latch configured to open when the external force pulling the tag away is greater than the second threshold.

2. The method according to claim 1 , wherein the device comprises an enclosure and a power source.

3. The method according to claim 1 , wherein the device comprises a memory system for storing program instructions, and a processing system for executing the program instructions.

4. The method according to claim 1 , wherein the attachment base further comprises an elongated shaft that extends into the enclosure, the elongated shaft comprising a magnet that is positioned adjacent to the sensor of the detector circuit when then attachment base is in the first position, Wherein the sensor of the detector circuit is a Hall-effect sensor that is configured to detect a change in a magnetic field of the magnet of the elongated shaft of the attachment base, the change in the magnetic field of the magnet of the elongated shaft from the first position to the second position causing the transmission of the alert signal.

5. The method according to claim 1 , wherein the detector circuit comprises circuitry and a sensor that is configured to detect when the at least one spring of the attachment base repositions from the first recess and the second recess.

6. The method according to claim 1 , wherein the device further comprises a reception system for receiving messages.

7. The method according to claim 6 , wherein the device further comprises a display system for displaying the received messages.

8. The method according to claim 1 , wherein the device further comprises a sleep mode circuitry for putting the mobile data processing device to a power save mode in response to fulfillment of a second set of predetermined conditions.

9. The method according to claim 8 , wherein the device further comprises a wake-up circuitry for putting the device to active mode in response to fulfillment of a third set of predetermined conditions.

10. The method according to claim 8 , wherein the sleep mode circuitry is configured to control power to the reception system, wherein after sending the at least one alert signal, the sleep mode circuitry keeps the reception system powered until an acknowledgement to the at least one alert signal is received.

11. The method according to claim 1 , wherein the device with the attachment base in the second position is visually different from the device with the attachment base in the first position.

12. The method according to claim 11 , wherein the first position and the second position constitute local energy minima for the attachment base, and there is at least one local energy maximum between the first position and the second position.

13. The method according to claim 12 , wherein the detector circuit does not detect said removal of the attachment base from the first position before the attachment base has proceeded beyond the local energy maximum.

14. The method according to claim 1 , wherein the device is configured to resist pulling of the attachment base from the first position to the second position by a first force which is between 15-35N.

15. The method according to claim 1 , wherein the device is configured to resist detachment of the attachment base from the enclosure by a second force which is greater than the first force and between 40-60N.